ADW: Orcaella brevirostris: Information

The age of sexual maturity is unknown, but there is evidence that at least some dolphins reach adult size when they are four to six years old. The gestation period is estimated to be fourteen months. A neonate born in captivity in Jakarta was 96 cm long and weighed 12.3 kg. It was born twelve days after milk was first seen discharging from its mother, and the tail was observed protruding from the genital slit more than two hours before the calf was born. The calf started suckling twelve hours after birth and eating dead fishes at the age of six months. It was fully weaned by two years of age. During its first seven months, the calf increased in length by 57 cm (59%) and in weight by 32.7 kg (266%). Ridgway and Harrison (1989)

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